Authentic Saint Laurent Opium Monogramme Heels

Hey, I purchased these recently at regular price at the Saint Laurent Boutique in SoHo New York. They are completely authentic please feel free to have them authenticated. They are the Black and Black Monogram Heel. I wore them once but they are too tight and since they are patent leather I can’t have them stretched. They come with the original box and dust bag. They are a size 40 (US sz 10) but they fit like a 9.